Combined bolster and step for spinning-spindles.



PATBNTED AUG. 18, 1903.,

. I. CALDWELL. COMBINED BOLSTER AND STEP FOR SPINNING SPINDLES.

APPLIUATION FILED JUNE 20, 1902.

N0 MdnLL.

FIEII- FIGIE.

NiTnn STATES Patented August 18, 1903.

PATENT OFFICE.

JOHN CALDWELL, OF EDGEWOOD,RHODE ISLAND, ASSIGNOR T0 RODOLPH F. MORSE,OF PROVIDENCE, RHODE ISLAND.

COMBINED BOLSTER AND STEP FOR SPINNING -SPINDLES.

SPECIFICATION forming part of Letters Patent N 0. 736,491, dated August18, 1903. Application filed June 20,1902. Serial No. 112,443. (Nomodel.)

To all whom it may concern:

Beit known that 1, JOHN CALDWELL, a citizen of the United States ofAmerica, and a resident of Edgewood, in the town of Cranston, Providencecounty, and State of Rhode Island, have invented certain new and usefulImprovements in a Combined Bolster and Step for Spinning-Spindles, ofwhich the following is a specification.

My inventian relates to improvements in spindle-bearin gs, or rather toa combined bolster and step for spinning-spindles; and it consists,essentially, of a non-revoluble bolster proper, made of helically-woundwire, a step into which the convolutions of the lower end of the bolsterare screwed, and an adjusting-screw mounted in the step adapted tosupport the rapidly-revolving spindle, the whole arranged to beremovably secured in a suitableholder or. supporting-case, all as willbe more fully hereinafter set forth and claimed.

The object I have in view is to provide the usual whirl-driven spindlesof spinning-machines with an improved bolster and step so constructedand arranged that when mounted in suitable holders the spindles may beoperated with greater efficiency or economy in power, the device alsobeing capable of close or accurate adjustment. 7

My improved bolster and step may be easily and quickly introduced intoor removed from the holder, as desired. Its construction is such that itforms a practically perfect lubricating device for the spindle. It isadapted to accommodate itself to varying loads and speeds in that thebolster is slightly resilient and not rigidly fitted to the bore of theholder, and, moreover, the cost is comparatively small as compared withother devices of this class heretofore produced.

I am aware that helically-wound wire bolsters have been devised longprior to my present invention; but a bolster of this type screwed into astep and provided with an adjustable spindle-supporting screw is, Ibelieve, both new and useful. 7

In the accompanying sheet of drawings, Figure 1 is a vertical centralsectional view of my improved bolster and step mounted in a holder orsupporting-case and also showing a spinning-spindle connected therewithas in use. Fig. 2 is a side elevation of the device detached from theholder and spindle; and Fig. 3 is a similar View in partial section,showing a slightly-modified form of the invention.

Again referring to the drawings, a indicates any suitable holderorsupporting-case bored out longitudinally to form a chamber b,adapted tofreely receive the bolster and step and having a closed bottom end a.portion is screw-threaded and provided with The lower a nut n, by meansof which the holder is adapted to be secured to the rail of thespinning-machine as usual. The revoluble spindle cl is provided with asleeve-whirl e, attached thereto, and also having the upper portion ofthe holder extending into and inclosed by the lower part of the saidmember ve, the same being constructed and adapted the bolster tapering,the degree of inclination being substantially the same as that of thespindle, as clearly shown.

To the lower end of the bolster is secured the cylindrical step p,having a central chamber or recess 19. The lower end of the step isscrew-threaded longitudinally to receive the adjusting-screw s. Theupper end of the screw is adapted to contact with and support thespindle d. The opposite or head end of the screw when in use rests uponthe lower end rt of the holder, as shown. The upper portion of the innerwall of the step is helioally grooved to snugly receive the lowercoilsof the bolster, the arrangement constituting a screw and nut and beingwhen thus united practically one or integral, as clearly shown in Fig.2.

In order to prevent the bolster and step from turning axially when inuse, the sideof the step has a shallow longitudinal groove g formedtherein in which an end of a pin 1' extends, the latter being rigidlysecured to the lower part of the bolster, as shown. This feature,however, is a well-known expedient employed for a similar purpose inother spindle-bearings.

In myinvention the relation of the slightlyresilient bolster to the stepis positively maintained, since they are secured together. view of thisthe screw 8 may be set or adjusted with great accuracy or precision,thereby insuring that the spindle when properly adjusted will revolve ina practically invariable plane and with a minimum degree of friction.

The holder-chamber forms an oil well or reservoir,which may be filled atthe inlet-noz zle r as common. I prefer to wind the coils forming thebolster so that the direction of rotation of the rapidly-revolvingspindle will tend to circulate the oil downwardly rather than toward thetop of the bolster, thus keeping the end of the spindle well lubricated.At the same time, however, the slight resiliency of the bolster permitsoil to gradually work between'the coils, and thus lubricate all thatpart of the spindle contained in the bolster.

It is obvious that my improved combined bolster and step is simple inconstruction and not liable to get out of order or repair and istherefore durable, besides being comparatively inexpensive to produce.It is adapted to be readily introduced into the holder and as readilyremoved therefrom when required.

In Fig. 3 I have represented a slight modification of the device. Inthis case the bolsteris wound in a straight or cylindrical manner inlieu of a tapering form and is provided with a thin sleeve or collar 11at the top, the same being interposed between the bolster and adjacentwall of the holder.

I claim as my invention and desire to secure by United States LettersPate'nt 1. In a device of the character described, the combination of abolster and step for spinning-spindles, comprising a bolster forming anon-revoluble bearing for the spinningspindle, said bolster formed ofhelicallywound wire, a recessed internally-threaded step member adaptedto retain the lower con volutions of the bolster screwed therein, saidbolster non-revolubly mounted in the step member, means to prevent therotation of said step, and an adjusting-screw for said spindle mountedin the lower end of the said step, substantially as described.

2. The combined spindle-bolster and ad justable step forspinning-spindles, the same comprising a bolster formed ofhelicallywound wire, said bolster forming a non-revoluble bearingthroughout its length for the spindle, the lower end of said bolster andspindle being seated in a recessed step member, said member havinginternal threads at its upper end to receive the lower coils of thebolster to hold the same against rotation therein, means to prevent therotation of said step member, and an adjusting-screw mounted in thebottom of said member, adapted to engage the lower end of the spindlewithin the recess of the step, substantially as described.

3. The combination with a revoluble spinning-spindle and asupporting-case therefor, a tapering bolster forming a bearing for thespindle, said bolster formed of coiled wire, a non-revoluble stepmounted in the supporting-case, said step being recessed and having itsupper portion internally threaded, said coiled bolster adapted to screwinto the step whereby the same is held against rotation therein, anadjusting-screw for the spindle mounted in the bottom of the step memberand extending into the recess thereof, and means for preventing therotation of the step member comprising a groove in the outer facethereof, and a pin to engage said groove mounted in the supporting-case,substantially as described.

Signed at Providence, Rhode Island, this 19th day of June, 1902.

JOHN CALDWELL.

Witnesses:

GEORGE H. REMINGTON, R. F. MORSE.

